
#include "apue.h"

static void sig_catch(int signo)
{
    printf("signal caught\n");
    tty_reset(STDIN_FILENO);
    exit(0);
}

int main()
{
    int i;
    char c;

    if (signal(SIGINT, sig_catch) == SIG_ERR)
    {
        err_sys("signal(SIGINT) error");
    }

    if (signal(SIGQUIT, sig_catch) == SIG_ERR)
    {
        err_sys("signal(SIGQUIT) error");
    }

    if (signal(SIGTERM, sig_catch) == SIG_ERR)
    {
        err_sys("signal(SIGTERM) error");
    }

    if (tty_raw(STDIN_FILENO) < 0)
    {
        err_sys("tty_raw error");
    }
    printf("Enter raw mode characters, terminate with DELETE\n");

    while ((i = read(STDIN_FILENO, &c, 1)) == 1)
    {
        if ((c &= 255) == 0177)
        {
            break;
        }
        printf("%o\n", c);
    }

    if (tty_reset(STDIN_FILENO) < 0)
    {
        err_sys("tty_reset error");
    }

    if (i <= 0)
    {
        err_sys("read error");
    }

    if (tty_cbreak(STDIN_FILENO) < 0)
    {
        err_sys("tty_cbreak error");
    }
    printf("\nEnter cbreak mode character, terminate with SIGINT\n");

    while ((i = read(STDIN_FILENO, &c, 1)) == 1)
    {
        c &= 255;
        printf("%o\n", c);
    }

    if (tty_reset(STDIN_FILENO) < 0)
    {
        err_sys("tty_reset error");
    }

    if (i <= 0)
    {
        err_sys("read error");
    }

    exit(0);
}
